I am Expert Russell H., and I would like to suggest what I thought of on reviewing your question thus far.
You may need to use the Windows 8.1 driver - given that there is one - or whatever the latest driver is, for the Canon printer.
First, go to Control Panel, and Devices and Printers.
Locate the icon for the Canon printer. Select it with one click, Delete it with the Del key.
Then, download, and save the install file for the Canon ImageRunner driver. (If you don't know where to download it from, I will instruct you. Let me know if that's the case.) Do not 'Run' the download, just Save it, if prompted.
Then, locate the saved file, where it was downloaded to, once the download is all done and finished for sure. Right-click on the file, and select Properties, then select Compatibility and set it for 'Windows 8.1' - or whatever version the latest driver for this printer is intended for.
Save the Compatibility setting by clicking on OK until the Properties sheet closes and disappears. Then double-click on the install file, and do the install over again.
That *may*, hopefully, provide the scanner function, as well as the printer function. Try it, and/or let me know what further specific information about this procedure you might need. Thanks.
The web page is
and the Windows 10 entries there do not include anything but printing drivers, no scanner drivers, so indeed the Windows 10 entries have not been updated enough to include scanning as a function.
If you have a Windows 10 64-bit installation, then choose Windows 8.1 64-bit I advise... download the one driver there that includes scanning: the
and remember to Save not Run it - for Compatibility Mode cannot be set if you choose Run, and the install will fail! So save it, then when downloading is complete, right-click and set Compatibility to Windows 8.1 64-bit.
(If you have a Windows 10 32-bit install, choose Windows 8.1 32-bit or just Windows 8.1).
Let me know how it goes, please. I like to hear, if my advice has been successful.
Then try downloading the Canon User Software, from among the Drivers listed, for
as a choice of operating system, on the page referenced. And set Compatibility Mode for that file, once it is downloaded fully and Saved, to Windows 7. See if that works.
Let me know how it goes, please. Thanks.
Did you set compatibility mode first, before double-clicking on the downloaded file?
When you set Compatibility Mode, did you also click on OK afterwards, to save the changed setting?
Yes, please do. That will make sure all is done right.
I'm left with no other conclusion than that Windows 10 and this machine's scanning function are not yet supported. You may have to wait until a Windows 10 scanning driver is written for this device and posted on the downloads page that I recommended to you.
In the meantime: does the machine still print OK, with the compatibility mode driver that you have now installed? if so, then compatibility mode is working. If not, then it isn't, and some other solution than 'wait until they write a Windows 10 scanner driver) may be possible.